I can play the New York track in Forza 2 blind. I can only use my Lexus 350 though. All my other ones are either too slow or too fast, and I'm not comfortable using them.
I can move through some CS maps without looking, at lest from the spawn point to conflict point, I tried it but that's about the peak of my capabilities. Some funny people gather on that site. Quote from comments from that article:
A dentist also told him if he didn't brush his teeth they would fall out, so he promptly bashed them out with a hammer and eats with a straw.
Also all credits to that kid for having the patience to finish the game.